Objectives. Caffeine ingestion has well-established ergogenic effects for resistance exercise performance. However, the concept of a minimum effective caffeine dose has not yet been thoroughly examined in the literature. Therefore, this review aimed to explore the minimum ergogenic dose of caffeine on resistance exercise outcomes, such as muscular strength, endurance, and velocity, using a meta-analytic approach. Methods. The search for eligible studies was performed through six databases. The methodological quality of the included studies was assessed using the PEDro checklist. A random-effects meta-analysis was performed for data analysis. Twelve studies that provided caffeine supplementation in doses from 0.9 to 2mg/kg were included. The studies were classified as being of good or excellent methodological quality. Results. The results revealed an ergogenic effect of caffeine for muscular strength (Cohen d: 0.17; 95% confidence interval [CI], 0.03-0.31; P = 0.02), muscular endurance (Cohen d: 0.21; 95% CI, 0.07-0.35; P = 0.003),...

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